RFR: 8311906: Improve robustness of String constructors with mutable array inputs [v12]

[Roger Riggs]

On Mon, 27 Nov 2023 13:43:52 GMT, Damon Fenacci <dfenacci at openjdk.org> wrote:

>> Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Apply StringUTF16.coderFromArrayLen
>
> src/hotspot/cpu/x86/macroAssembler_x86.cpp line 8584:
> 
>> 8582:     evpcmpuw(mask1, tmp1Reg, tmp2Reg, Assembler::le, Assembler::AVX_512bit);
>> 8583:     kortestdl(mask1, mask1);
>> 8584:     jcc(Assembler::carryClear, reset_for_copy_tail);
> 
> Suggestion:
> 
>     jccb(Assembler::carryClear, reset_for_copy_tail);
> 
> 
> and here:
> 
> https://github.com/openjdk/jdk/blob/d201344b631bf2cc9fb1990874fc7d42d523eeab/src/hotspot/cpu/x86/macroAssembler_x86.cpp#L8590

Thanks for the suggestions to use byte offset branches.

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PR Review Comment: https://git.openjdk.org/jdk/pull/16425#discussion_r1406506896